1. Add the onion and bell pepper to the bottom of the crock pot. Add meat; sprinkle with thyme, rosemary, salt and pepper. Pour broth over meat. Cover and cook on low for 9 to 10 hours or on high-heat setting for 4½ to 5 hours.2. Meanwhile, in a medium saucepan combine all sauce ingredients; stir well. Bring to boiling; reduce heat. Simmer, uncovered, for 20 to 25 minutes or until slightly thickened, stirring occasionally.3. Transfer meat to a cutting board. Use two forks to pull meat apart into shreds, discarding any fat. Strain vegetable mixture, discarding liquid. Return shredded meat and vegetables to cooker. Stir in sauce. Cover and cook for 20-30 minutes on low.4. To serve, add 2 ounces of meat and about 3 tablespoons coleslaw to each sandwich bun. Serve immediately.